<template>
  <div id="add">
    <!-- 添加用户的对话框 -->
    <el-dialog title="添加商品" :visible.sync="dialog" :before-close="closeDialog" width="35%">
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息" />
        <el-step title="商品参数" />
        <el-step title="商品属性" />
        <el-step title="商品图片" />
        <el-step title="商品内容" />
      </el-steps>

      <!-- 内容主体区域 -->
      <el-form ref="addFormRef" :rules="addFormReles" :model="addForm" label-position="top" label-width="auto" style="padding: 10px 32px 0 10px;">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name" />
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" />
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" />
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" />
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="categoriesList" :props="cateProps" @change="handleCategoriesChange" />
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(cb, i) in item.attr_vals" :key="i" style="display: block; margin: 0 10px 10px;" border :label="cb" />
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item v-for="item in onlyTableData" :key="item.attr_id" :label="item.attr_name">
              <el-input v-model="item.attr_vals" />
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 表示图片要上传到的后台API地址 -->
            <el-upload :action="uploadURl" :headers="headersObj" list-type="picture" :on-preview="handlePreview" :on-remove="handleRemove" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce" style="height: 200px;" />
            <!-- 添加商品的按钮 -->
            <el-button type="primary" style="float: right; margin-top: 100px" @click="confirmDialog">确认提交</el-button>
            <!-- 取消按钮 -->
            <el-button style="float: right; margin: 100px 10px 0 0" @click="closeDialog">取消操作</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>

    </el-dialog>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="PreviewPath" alt="" style="width: 100%;">
    </el-dialog>

  </div>

</template>

<script>
import { categoriesList, categoriesAttributes } from '@/api/goods'
// 引入富文本编辑器
import 'quill/dist/quill.core.css'
import 'quill/dist/quill.snow.css'
import 'quill/dist/quill.bubble.css'

import { quillEditor } from 'vue-quill-editor'

export default {
  name: 'AddItem',
  // 引入富文本编辑器
  components: {
    'quill-editor': quillEditor
  },
  props: {
    // 组件接收父级传递的控制弹框 打开/关闭的状态值
    dialog: {
      type: Boolean,
      default: null
    }
  },
  data() {
    return {
      // 步骤条激活选中(tabs标签页激活)
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: null,
        goods_weight: null,
        goods_number: null,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详细描述
        goods_introduce: '请填写商品的详细描述',
        attrs: []
      },
      // 富文本编辑器配置
      editorOption: {
        placeholder: 'placeholder',
        // 编辑器的配置
        // something config
        theme: 'bubble'
      },
      addFormReles: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      categoriesList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 上传图片的URL地址
      uploadURl: 'http://8.136.22.136:3000/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      PreviewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCategoriesList()
  },
  methods: {
    // 获取所有商品分类数据 ①
    getCategoriesList() {
      categoriesList().then((response) => {
        if (response.data.meta.status !== 200) {
          return this.$message.error('获取商品分类数据失败！')
        }
        this.categoriesList = response.data.data
      })
    },
    // 基本信息的级联选择器选择项变化，会触发这个函数
    handleCategoriesChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是：' + oldActiveName)
      // console.log('即将进入的标签页名字是：' + activeName)
      // 控制级联选择完成，才可以跳转到下一条标签页
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3 && this.$refs['addFormRef'].validate()) {
        this.$message.error('请将商品信息填写完整！')
        return false
      }
    },
    // tab选中会触发 ②、③
    tabClicked() {
      if (this.activeIndex === '1') {
        // 在商品参数标签页，进行动态参数获取
        // const cateId = this.addForm.goods_cat[2]
        const data = {
          cateId: this.addForm.goods_cat[2],
          type: 'many'
        }
        categoriesAttributes(data).then((response) => {
          if (response.data.meta.status !== 200) {
            return this.$http.error('获取商品参数失败！')
          }
          // 将获取到的参数的attr_vals变为数组
          response.data.data.forEach((item) => {
            item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          })
          this.manyTableData = response.data.data
        })
      } else if (this.activeIndex === '2') {
        // 在商品属性标签页，进行静态属性获取
        const data = {
          cateId: this.addForm.goods_cat[2],
          type: 'only'
        }
        categoriesAttributes(data).then((response) => {
          if (response.data.meta.status !== 200) {
            return this.$http.error('获取商品属性失败！')
          }
          this.onlyTableData = response.data.data
        })
      }
    },
    // 处理图片预览效果 ④
    handlePreview(file) {
      // console.log(file)
      this.PreviewPath = file.response.data.data.url
      this.previewVisible = true
    },
    // 处理图片移除效果
    handleRemove(file) {
      // console.log(file)
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.从 pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      // 3.调用数组的 splice方法，把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      // console.log(response)
      // 1. 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.data.tmp_path }
      // 2. 将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },

    // 点击取消按钮，向父级传递，让父级控制对话框关闭
    closeDialog() {
      this.$emit('close')
    },
    // 点击确认，处理提交表单，向父级传递
    confirmDialog() {
      this.$refs['addFormRef'].validate((valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // lodash   cloneDeep(obj)
        // const form = _.cloneDeep(this.addForm)
        const addData = Object.assign({}, this.addForm)
        addData.goods_cat = addData.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        addData.attrs = this.addForm.attrs
        this.$emit('add', addData)
      })
    }
  }
}
</script>

<style scoped>
/* 级联选择器样式 */
.el-cascader {
  width: 100%;
}
</style>
